Dry Eye Clinical Trial
Official title:
A Clinical Trial on the Efficacy of Bilberry-containing Capsules for Dry Eye Mitigation
This study investigates whether the oral intake of a bilberry capsule product may relieve dry eye symptoms. Participants will be aged between 20 - 65 years of age, with confirmed diagnosis of dry eye status. The participants will be assessed for several parameters and asked to take 4 bilberry capsules per day for 30 days. The parameters will include ocular surface health, tear volume, tear quality, intraocular pressure, and tear compositions. After the 30 days are completed, the participants will be assessed again for the same parameters.
This investigation is a randomized, double-blind study. Subjects with confirmed diagnosis of dry eye are randomly assigned to group A or group B, and asked to orally intake 4 capsules of either bilberry product or placebo per day.The group A will have bilberry product for 30 days, have a 20-day washout period, and then have placebo for another 30 days. The group B will have placebo for 30 days, have a 20-day washout period, and then have bilberry product for another 30 days. All participants will be assessed for parameters, including intraocular pressure, ocular surface health, tear film breakup time (TBUT), tear volume (Schirmer's test), tear composition (Na+, K+, Cl- ions), tear osmolarity, ocular surface impression cytology, and ocular surface disease index (OSDI). The assessments are conducted immediately before the first 30-day and immediately after the second 30-day oral intake period. The parameters are used to compare and evaluate whether the bilberry product can relieve dry eye symptoms. ;
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